Hearing aid



FIG. 1 is a front perspective view of a hearing aid of the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a rear perspective view thereof.

The broken lines in FIG. 1, 6 and 8 are included for the purpose of illustrating a portion of the hearing aid that forms no part of the claimed design. 

We claim the ornamental design for a hearing aid, as shown and described. 